Optical and vibrational properties of 2H-, 4H-, and 6H-AlN: First-principle calculations
Optical and vibrational properties of 2H-, 4H-, and 6H-AlN: First-principle calculations
复制标题
2H-、4H- 和 6H-AlN 的光学和振动特性:第一原理计算
DOI:
10.1063/1.3095511
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发表时间:
2009-04
影响因子:
3.2
通讯作者:
Chen, H. T.
中科院分区:
文献类型:
--
作者:
Li, S. H.;Wu, X. L.;Zhu, J.;Chu, Paul K.;Li, X. X.;Cheng, Y. C.;Chen, H. T.
The optical and vibrational properties of 2H-, 4H-, and 6H-AlN are studied based on the ab initio pseudopotential density functional theory. Three polymorphs have similar electronic and optical properties implying that 4H- and 6H-AlN are also of importance to optoelectronics. Infrared spectra of the three polymorphs show two main modes at 660 and 690 cm−1 and an additional mode at 570 cm−1 can only be observed from 4H- and 6H-AlN. The Raman spectra of 4H- and 6H-AlN show more active modes than that of 2H-AlN. These infrared and Raman features can be used as the fingerprints to distinguish the three polymorphs.
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